Copyright 2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-1 Chapter 3 Drawing Representation: Sectioning, welding and surface texture After studying this chapter you should be able to do the following: apply sectioning techniques to engineering drawings draw sectional views represent standard welding data and instructions on drawings indicate the application of surface texture requirements from machining and other processes on component drawings
Copyright 2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-2 Figure 3.1 – (a) General symbol for hatching; (b) aid for drawing hatching lines
Copyright 2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-3 Figure 3.2 – General application of hatching lines
Copyright 2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-4 Figure 3.3 – Special application of hatching lines
Copyright 2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-5 Figure 3.4 – Representation of a sectional view
Copyright 2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-6 Figure 3.5 – Sectional view with identification of cutting plane omitted
Copyright 2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-7 Figure 3.6 – Hatching of thin parts
Copyright 2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-8 Figure 3.7 – Exceptions to the general rule of sectioning
Copyright 2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-9 Figure 3.8 – Revolved and interposed sections
Copyright 2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-10 Figure 3.9 – Removed sections
Copyright 2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-11 Figure 3.10 – Part or local sections
Copyright 2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-12 Figure 3.11 – Aligned sections (note: in both examples the projection lines would not be shown on the finished drawing)
Copyright 2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-13 Figure 3.12 – Pictorial view of section
Copyright 2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-14 Figure 3.13 – Orthogonal view of section
Copyright 2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-15 Figure 3.14– Pictorial view of offset section
Copyright 2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-16 Figure 3.15 – Orthogonal view of offset section
Copyright 2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-17 Figure 3.16 – Pictorial view of half section
Copyright 2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-18 Figure 3.17 – Orthogonal view of half section
Copyright 2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-19 Figure 3.18 – Standard location of elements on a welding symbol
Copyright 2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-20 Figure 3.19 – Welding terminology
Copyright 2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-21 Figure 3.2 – Representation of the welding symbol
Copyright 2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-22 Figure 3.21 – Use of cranked arrow
Copyright 2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-23 Figure 3.22 – Surface texture terminology
Copyright 2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-24 Figure 3.23 – Surface roughness profile
Copyright 2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-25 Figure 3.24 – Surface roughness symbol
Copyright 2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-26 Figure 3.25 – Application of the surface texture symbol